From patchwork Sat Apr 5 00:30:50 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Laura Abbott X-Patchwork-Id: 3941711 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id BDE4E9F1EE for ; Sat, 5 Apr 2014 00:31:30 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 0EA9920383 for ; Sat, 5 Apr 2014 00:31:30 +0000 (UTC) Received: from casper.infradead.org (casper.infradead.org [85.118.1.10]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 1742B20381 for ; Sat, 5 Apr 2014 00:31:29 +0000 (UTC) Received: from merlin.infradead.org ([2001:4978:20e::2]) by casper.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1WWEW2-0001aw-0R; Sat, 05 Apr 2014 00:31:22 +0000 Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1WWEVz-0003B0-Mz; Sat, 05 Apr 2014 00:31:19 +0000 Received: from smtp.codeaurora.org ([198.145.11.231]) by merlin.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1WWEVw-0003AN-UR for linux-arm-kernel@lists.infradead.org; Sat, 05 Apr 2014 00:31:17 +0000 Received: from smtp.codeaurora.org (localhost [127.0.0.1]) by smtp.codeaurora.org (Postfix) with ESMTP id 7F96513ED7A; Sat, 5 Apr 2014 00:30:55 +0000 (UTC) Received: by smtp.codeaurora.org (Postfix, from userid 486) id 70ED513F128; Sat, 5 Apr 2014 00:30:55 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Spam-Level: X-Spam-Status: No, score=-4.8 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 Received: from lauraa-linux1.qualcomm.com (i-global254.qualcomm.com [199.106.103.254]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) (Authenticated sender: lauraa@smtp.codeaurora.org) by smtp.codeaurora.org (Postfix) with ESMTPSA id 11CCF13ED7A; Sat, 5 Apr 2014 00:30:55 +0000 (UTC) From: Laura Abbott To: Catalin Marinas , Will Deacon Subject: [PATCH] arm64: Add missing Kconfig for CONFIG_STRICT_DEVMEM Date: Fri, 4 Apr 2014 17:30:50 -0700 Message-Id: <1396657850-14252-1-git-send-email-lauraa@codeaurora.org> X-Mailer: git-send-email 1.8.2.1 X-Virus-Scanned: ClamAV using ClamSMTP X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20140404_203117_076396_D4D5D254 X-CRM114-Status: GOOD ( 13.54 ) X-Spam-Score: -2.5 (--) Cc: Laura Abbott , linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP The Kconfig for CONFIG_STRICT_DEVMEM is missing despite being used in mmap.c. Add it. Signed-off-by: Laura Abbott --- arch/arm64/Kconfig.debug | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/arch/arm64/Kconfig.debug b/arch/arm64/Kconfig.debug index 835c559..4be4336 100644 --- a/arch/arm64/Kconfig.debug +++ b/arch/arm64/Kconfig.debug @@ -6,6 +6,20 @@ config FRAME_POINTER bool default y +config STRICT_DEVMEM + bool "Filter access to /dev/mem" + depends on MMU + help + If this option is disabled, you allow userspace (root) access to all + of memory, including kernel and userspace memory. Accidental + access to this is obviously disastrous, but specific access can + be used by people debugging the kernel. + + If this option is switched on, the /dev/mem file only allows + userspace access to memory mapped peripherals. + + If in doubt, say Y. + config EARLY_PRINTK bool "Early printk support" default y